Horn Shark Identification Guide

Key identification features

• Thick-bodied, small shark rarely over 4 feet, with a short, blunt, almost pig-like snout
• Prominent bony ridges above each eye, giving a heavy-browed look
• Two dorsal fins, each armed with a stout spine at the leading edge
• Grayish to light brown body covered in irregular dark brown spots and blotches
• Broad head tapering to a slim, laterally compressed tail

Common look-alikes

• Swellshark: lacks dorsal spines entirely and has a more elongated, mottled body rather than distinct spots
• Port Jackson shark: shares the ridged brow and dorsal spines but shows bold dark harness-like markings across the shoulders and is restricted to Australian waters
• Other bullhead sharks: separated mainly by range and the specific spot or bar pattern on the skin

Where you'll see one

Horn sharks are bottom dwellers found in rocky reefs, kelp forests, and sandy patches of the eastern Pacific, from central California to the Gulf of California. They are most active at night, often found wedged into crevices or resting motionless on the seafloor by day.

Divers frequently spot them tucked under ledges, and their distinctive spiral-shaped egg cases, often wedged into rock crevices, are another reliable sign of their presence in an area.